Another driver made safer for big mem by dma_alloc/dma_free'ing memory used for i/o.
Another driver made safer for big mem by dma_alloc/dma_free'ing
memory used for i/o.

ok dlg@ deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars